This is a ac4 chassis set into a pathfinder 10 cabinet to make a head. The reason I did this is because the ac4 head that Vox makes doesn't have a gain control, only the bigger combos do. So I made one myself. Also, I clipped the c6 and c20 capacitors to tame the brightness, and upgraded the tubes to JJ. This will plug right into any 16 ohm cabinet and it sounds fantastic. Asking $225 obo